Defect
Under certain conditions, a software problem could cause the vacuum pump to stop working. If this happens, it could cause a loss of brake assist and a sudden increase in brake pedal force. Note: This problem would cause a brake warning light to turn on and a warning message to display in the instrument cluster.
Safety Risk
A sudden increase in brake pedal force can cause extended stopping distances and increase the risk of a crash.
Remedy
Aston Martin will notify owners by mail and advise you to take your vehicle to a dealership to update the electronic stability program (ESP) software.